Low-Profile Rotary Coolant Valve With Radial Port Routing
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Solution Overview
Problem
Conventional rotary valves with axially extending fluid ports occupy significant packaging space due to the need for perpendicular fluid lines, making them difficult to accommodate in limited spaces such as those found in motor vehicles.
Innovation Solution
A rotary valve design that eliminates the axially extending fluid port by routing fluid flow from an axial passageway port to a circumferential passageway port through a 90-degree turn, allowing for a reduced axial dimension and minimized packaging space by using a valve housing with radially oriented ports and a flow path between the valve housing and rotary valve body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an axially aligned port is used to receive fluid flow before a 90 degree turn, then the flow characteristics are consistently altered similarly at each rotational position, but the axial dimension of the valve is significantly increased
Solution Approach 1:
Instead of having fluid enter axially and turn 90 degrees radially, the invention inverts the flow path by having fluid enter radially through a circumferential port and turn 90 degrees axially through the rotary valve body passageway. This inversion maintains consistent flow characteristics while reducing the axial dimension requirement.
Solution Approach 2:
The invention changes the primary flow direction from axial to radial by positioning the inlet port circumferentially rather than axially. This dimensional change allows the valve to achieve its flow distribution function with a reduced axial profile while maintaining consistent flow characteristics across rotational positions.
2Adaptability or versatility
If multiple fluid lines are routed at perpendicular orientations, then the valve can accommodate different flow configurations, but the packaging space is significantly increased
Solution Approach 1:
The rotary valve body with its rotatable passageways provides universal flow distribution capability, allowing a single radial inlet port to serve multiple outlet ports at different rotational positions. This eliminates the need for multiple dedicated inlet ports and their associated perpendicular fluid lines, reducing packaging space while maintaining flow configuration flexibility.
Solution Approach 2:
The invention merges multiple potential inlet functions into a single radial inlet port. By rotating the valve body, this single port can align with different outlet passageways, combining the functionality of what would otherwise require multiple separate inlet ports and fluid lines.
3Reliability
If the inlet port extends perpendicularly away from the plane of circumferential ports, then the axial flow to radial flow configuration is achieved, but the difficulty of accommodating the valve in limited packaging space increases
Solution Approach 1:
The invention employs asymmetric port positioning where the inlet port is located circumferentially on the valve housing while outlet ports are positioned on the rotary valve body at specific angular positions. This asymmetric arrangement achieves the required flow path configuration without the need for an axially extending inlet port, making the valve easier to accommodate in limited packaging spaces.
Data Source
AI summary
A rotary valve includes a rotary valve body defining a passageway from a first passageway port at an axial end surface of the rotary valve body to a second passageway port at an outer circumferential surface thereof. A valve housing has an inner surface defining each of an opening rotatably receiving the rotary valve body therein, a first housing port through which a fluid flows transverse to the axis of rotation of the rotary valve body, and a second housing port through which the fluid flows transverse to the axis of rotation of the rotary valve body. A flow path is formed between the inner surface of the valve housing and the outer surface of the rotary valve body with the flow path providing fluid communication between the first housing port of the valve housing and the first passageway port of the rotary valve housing.